Detailed explanation of Parcel packaging example
This article mainly introduces the Parcel packaging example (React HelloWorld), and introduces the characteristics and usage examples of Parcel packaging in detail. If you are interested, you can learn about it. I hope it can help everyone.
Parcel packaging features
Extremely fast packaging time
Parcel uses worker processes to enable multi-core compilation. There is also a file system cache to enable fast recompiling even after restarting the build.
Package all your resources
Parcel has out-of-the-box support for JS, CSS, HTML, files and more, and no plugins are required.
Automatic conversion
If necessary, Babel, PostCSS, and PostHTML and even the node_modules package will be used to automatically convert the code.
Configuring code splitting
Using dynamic import() syntax, Parcel splits your output file bundles (bundles), so you only need to load the code you need on the initial load.
Hot module replacement
Parcel does not require configuration. In the development environment, the module will be automatically updated in the browser as your code changes.
Friendly error log
When an error is encountered, Parcel will output a code snippet with syntax highlighting to help you locate the problem.
React HelloWorld application packaged using Parcel. GitHub address: https://github.com/justjavac/parcel-example/tree/master/react-helloworld
0. Create a new directory
mkdir react-helloworld cd react-helloworld
1. Initialize npm
yarn init -y
or
npm init -y
The package.json file will be created at this time. The file content is:
{
"name": "parcel-example-react-helloworld",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC"
}2. Add React
yarn:
yarn add react react-dom
npm:
npm install react react-dom --save
package.json File content:
{
"name": "parcel-example-react-helloworld",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
- "license": "ISC"
+ "license": "ISC",
+ "dependencies": {
+ "react": "^16.2.0",
+ "react-dom": "^16.2.0"
+ }
}3. Add Babel
New .babelrc file
touch .babelrc
Input content:
{
"presets": ["react"]
}Add babel-preset-react:
yarn:
yarn add babel-preset-react -D
npm:
npm install babel-preset-react --D
At this time, the package.json file content:
{
"name": "parcel-example-react-helloworld",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0"
- }
+ },
+ "devDependencies": {
+ "babel-preset-react": "^6.24.1"
+ }
}5 . Add Parcel
yarn:
yarn add parcel-bundler -D
npm:
npm install parcel-bundler --D
At this time, the package.json file content:
{
"name": "parcel-example-react-helloworld",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0"
},
"devDependencies": {
- "babel-preset-react": "^6.24.1"
+ "babel-preset-react": "^6.24.1",
+ "parcel-bundler": "^1.0.3"
}
}6. Create a new index.html file
Content
<html> <body> <p id="root"></p> <script src="./index.js"></script> </body> </html>
7. Create a new index.js file
import React from "react";
import ReactDOM from "react-dom";
const App = () => {
return <h1>Hello World!</h1>;
};
ReactDOM.render(<App />, document.getElementById("root"));8 . Add packaging command
{
"name": "parcel-example-react-helloworld",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
- "test": "echo \"Error: no test specified\" && exit 1"
+ "start": "parcel index.html"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0"
},
"devDependencies": {
"babel-preset-react": "^6.24.1"
"babel-preset-react": "^6.24.1",
"parcel-bundler": "^1.0.3"
}
}9. Complete
Run
yarn start
or
npm start
Open http://localhost:1234
in the browser and the packaging process will produce There are two directories, .cache and dist. If it is a git project, you can create a new .gitignore file to ignore these two directories:
.cache dist node_modules
GitHub address: https://github.com /justjavac/parcel-example/tree/master/react-helloworld
Related recommendations:
Packaging tool parcel zero-configuration vue development scaffolding
Parcel.js and Vue 2.x Extremely fast zero-configuration packaging experience example
Detailed explanation of nodejs to implement simple gulp packaging
The above is the detailed content of Detailed explanation of Parcel packaging example. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Detailed explanation of obtaining administrator rights in Win11
Mar 08, 2024 pm 03:06 PM
Windows operating system is one of the most popular operating systems in the world, and its new version Win11 has attracted much attention. In the Win11 system, obtaining administrator rights is an important operation. Administrator rights allow users to perform more operations and settings on the system. This article will introduce in detail how to obtain administrator permissions in Win11 system and how to effectively manage permissions. In the Win11 system, administrator rights are divided into two types: local administrator and domain administrator. A local administrator has full administrative rights to the local computer
Detailed explanation of division operation in Oracle SQL
Mar 10, 2024 am 09:51 AM
Detailed explanation of division operation in OracleSQL In OracleSQL, division operation is a common and important mathematical operation, used to calculate the result of dividing two numbers. Division is often used in database queries, so understanding the division operation and its usage in OracleSQL is one of the essential skills for database developers. This article will discuss the relevant knowledge of division operations in OracleSQL in detail and provide specific code examples for readers' reference. 1. Division operation in OracleSQL
Detailed explanation of the role and usage of PHP modulo operator
Mar 19, 2024 pm 04:33 PM
The modulo operator (%) in PHP is used to obtain the remainder of the division of two numbers. In this article, we will discuss the role and usage of the modulo operator in detail, and provide specific code examples to help readers better understand. 1. The role of the modulo operator In mathematics, when we divide an integer by another integer, we get a quotient and a remainder. For example, when we divide 10 by 3, the quotient is 3 and the remainder is 1. The modulo operator is used to obtain this remainder. 2. Usage of the modulo operator In PHP, use the % symbol to represent the modulus
Detailed explanation of the linux system call system() function
Feb 22, 2024 pm 08:21 PM
Detailed explanation of Linux system call system() function System call is a very important part of the Linux operating system. It provides a way to interact with the system kernel. Among them, the system() function is one of the commonly used system call functions. This article will introduce the use of the system() function in detail and provide corresponding code examples. Basic Concepts of System Calls System calls are a way for user programs to interact with the operating system kernel. User programs request the operating system by calling system call functions
Detailed explanation of Linux curl command
Feb 21, 2024 pm 10:33 PM
Detailed explanation of Linux's curl command Summary: curl is a powerful command line tool used for data communication with the server. This article will introduce the basic usage of the curl command and provide actual code examples to help readers better understand and apply the command. 1. What is curl? curl is a command line tool used to send and receive various network requests. It supports multiple protocols, such as HTTP, FTP, TELNET, etc., and provides rich functions, such as file upload, file download, data transmission, proxy
Detailed explanation of VSCode functions: How does it help you improve work efficiency?
Mar 25, 2024 pm 05:27 PM
Detailed explanation of VSCode functions: How does it help you improve work efficiency? With the continuous development of the software development industry, developers' pursuit of work efficiency and code quality have become important goals in their work. In this process, the choice of code editor becomes a key decision. Among many editors, Visual Studio Code (VSCode for short) is loved by the majority of developers for its powerful functions and flexible scalability. This article will introduce some functions of VSCode in detail and discuss
Learn more about Promise.resolve()
Feb 18, 2024 pm 07:13 PM
Detailed explanation of Promise.resolve() requires specific code examples. Promise is a mechanism in JavaScript for handling asynchronous operations. In actual development, it is often necessary to handle some asynchronous tasks that need to be executed in sequence, and the Promise.resolve() method is used to return a Promise object that has been fulfilled. Promise.resolve() is a static method of the Promise class, which accepts a
Declaration of Independence for Python Applications: PyInstaller's Road to Freedom
Feb 20, 2024 am 09:27 AM
PyInstaller: Independence of Python applications PyInstaller is an open source python packaging tool that packages Python applications and their dependencies into an independent executable file. This process eliminates dependence on the Python interpreter while allowing applications to run on a variety of platforms, including Windows, MacOS, and Linux. Packaging Process The packaging process of PyInstaller is relatively simple and involves the following steps: pipinstallpyinstallerpyinstaller--onefile--windowedmain.py--onefile option creates a single
